USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · Nevada County
Empire Mines Co.
Unconfirmed Gold Underground
Key facts
- State
- California
- County
- Nevada
- Development status
- Past Producer
- Mine type
- Underground
- Primary commodity
- Gold
- Verification
- Unconfirmed
Mine Location
Approximate AreaDocumented underground workings
Source classification: Underground operation documented
Specific physical workings are not yet documented in discrete records.
Historical mapped workings
USGS historical topographic mapping. Features may no longer exist.
- 9 shaft symbols
- 1 adit symbol
View individual source records (2)
Every underlying record used to build the summary above, for research/verification use.
- USGS MRDS working type: Underground
- MRDS work_type documents underground workings: Underground · work_type
Verification
Unconfirmed
Source records support underground workings, but UndergroundMines has not yet independently verified this mine.
Why it's listed
USGS source data documents underground workings for this record.
History & operations
Historical record
- Development status: Past Producer
Commodities & minerals
Reported minerals
- Quartz
- Gold
Photos
Wikimedia Commons
Access & recent conditions
- Land
- state land
- Source
- California State Parks — Empire Mine SHP
- Access information last checked
- August 9, 2026
Community reports
Sources & evidence
USGS Historical Topographic Mine Features
Type: Historical mapped physical features
Dataset: DOI 10.5066/P9TAALR6
Supports:
- mapped shaft symbols (9)
- mapped adit symbols (1)
Historical mapped features may no longer exist.
California State Parks — Empire Mine SHP
Type: Access / land-management source
Supports:
- access / lawful visit information
Approved historical / mine photographs
Type: Image sources
Record: 1 approved photograph
Supports:
- visual documentation
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